Followers of the Criterion Collection on Twitter or Facebook have no doubt already dove in, but those that haven't yet heard may want to direct their attention to the Hulu page featured at the source link. There you'll find hundreds of Criterion titles ready for streaming, all of which have been made available for free this weekend (for those that have access to Hulu, that is). It doesn't include all of the films Criterion has released on DVD and Blu-ray, but it's an impressive selection, including many well-known classics and more obscure gems alike; there's even some that Criterion hasn't yet released on physical media.

If you're looking for some science fiction to get started (this is Engadget, after all), we'd recommend an art house sci-fi double feature of Andrei Tarkovsky's Solaris and Rainer Werner Fassbinder's World on a Wire -- or Chris Marker's La Jetée,the inspiration for Terry Gilliam's 12 Monkeys,if you'd prefer something a bit shorter.